[unleashkids]

Calibre and calibre-bin 3.27.1 were released for Raspberry Pi (Raspbian) earlier today:

http://raspbian.raspberrypi.org/rasp...ain/c/calibre/
http://archive.raspbian.org/raspbian...ain/c/calibre/

Installing 3.26.1 worked on Raspberry Pi until yesterday, using stock method:

echo "deb http://raspbian.raspberrypi.org/raspbian/ testing main" > /etc/apt/sources.list.d/rpi-testing.list
apt update
apt -y install calibre calibre-bin

Suddenly today however this no longer works with 3.27.1:

The following packages have unmet dependencies:
calibre : Depends: python-pyqt5 (>= 5.11.2+dfsg-1) but 5.10.1+dfsg-2+rpi1 is to be installed
E: Unable to correct problems, you have held broken packages.

This is reminiscent of 3.24.x and 3.25 failing to install throughout early June:

The following packages have unmet dependencies:
calibre : Depends: python-pyqt5 (>= 5.10.1+dfsg-2) but 5.10.1+dfsg-1+rpi1 is to be installed
E: Unable to correct problems, you have held broken packages.

Can anybody think of a way to obtain 5.11.2+dfsg-1 despite the following?

root@box:~# apt -a list python-pyqt5
Listing... Done
python-pyqt5/testing 5.10.1+dfsg-2+rpi1 armhf [upgradable from: 5.7+dfsg-5]
python-pyqt5/stable,now 5.7+dfsg-5 armhf [installed,upgradable to: 5.10.1+dfsg-2+rpi1]

(So schools are not blocked as they were in early June!)